linux-kernel - Re: 2.6.19-rc6-rt8

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Date:	Wed, 29 Nov 2006 07:57:34 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Karsten Wiese <fzu@...gehoertderstaat.de>
Cc:	Fernando Lopez-Lezcano <nando@...ma.stanford.edu>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.19-rc6-rt8


* Karsten Wiese <fzu@...gehoertderstaat.de> wrote:

> Am Montag, 27. November 2006 10:49 schrieb Ingo Molnar:
> > i have released the 2.6.19-rc6-rt8 tree, which can be downloaded from 
> 
> I saw usb transport errors here before rebooting with
> 	nmi_watchdog=0
> contained in kernel command line.

so nmi_watchdog=1 (or was it nmi_watchdog=2 ?) caused these problems - 
and then nmi_watchdog=0 fixed them? i686? Extremely weird. Does the 
patch below fix the issue perhaps?

	Ingo

Index: linux/arch/i386/kernel/nmi.c
===================================================================
--- linux.orig/arch/i386/kernel/nmi.c
+++ linux/arch/i386/kernel/nmi.c
@@ -932,12 +932,14 @@ notrace __kprobes int nmi_watchdog_tick(
 
 	__profile_tick(CPU_PROFILING, regs);
 
+#if 0
 	/* check for other users first */
 	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
 			== NOTIFY_STOP) {
 		rc = 1;
 		touched = 1;
 	}
+#endif
 
 	/*
 	 * Take the local apic timer and PIT/HPET into account. We don't
Index: linux/arch/x86_64/kernel/nmi.c
===================================================================
--- linux.orig/arch/x86_64/kernel/nmi.c
+++ linux/arch/x86_64/kernel/nmi.c
@@ -814,12 +814,14 @@ int __kprobes nmi_watchdog_tick(struct p
 
 	__profile_tick(CPU_PROFILING, regs);
 
+#if 0
 	/* check for other users first */
 	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
 			== NOTIFY_STOP) {
 		rc = 1;
 		touched = 1;
 	}
+#endif
 
 	sum = read_pda(apic_timer_irqs);
 	if (nmi_show_regs[cpu]) {
-
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